Posting this here because I had the issue and had to do some digging to find a fix.

I found a fix for the broken font on Anbennar's discord. Thank you to ottokard from Anbennar discord for providing the fix.

If anyone else has the issue, you need to:

1. Open in Notepad the descriptor.mod file in this mod's folder
2. Change the contents to look like this:
version="0.1"
tags={
"Graphics"
}
dependencies={
"Anbennar-PublicFork"
"Anbennar: A Fantasy Total Conversion Mod"
}
name="Imperial Graphics for Anbennar"
supported_version="1.34.*"
remote_file_id="2839269919"
3. Save the file and run the game as normal.

You just need to add the dependencies part and it's all working good for me now. Can't play without this mod.